Finite Element Analysis of Acrylic Denture Produced From Visible Light Custom Tray

Abstract

Aim: To determine stress analysis exerted by denture on the edentulous alveolar bone in the premolar
region represented by stone cast produced from visible light custom tray using linear finite element
method. Material and Method: Visible light custom tray (spaced and close fit) was used to produce
stone cast that represent the denture base and the underlying bone using silicone impression material.
The dimension of the cross section of the stone cast was measured using Dimax program, then the data
collected was entering Excel program for making the figures. The dimension of the cross section of the
stone cast entering finite element program and other new auxiliary program prepared specially for this
study for finite element analysis of vertical load of 100 Newton applied on the buccal cup (supporting
cusp) of the second premolar tooth. Result: After the data was analyzed, the results were drawn in
figures using surfer 7 program. High compressive, tensile, deflection, shear and maximum principal
stress values were observed below the point of force application and in the underlying structure with
different values and locations according to the analysis in the mucous membrane and in the underlying
bone in the X and Y axes. Conclusion: By using finite element analysis, the more stress concentration
and deflection were found below the point of force application, in the mucous membrane, at the beginning
of the cortical bone and along the buccal vestibule. The less stress concentration, deflection and
less value of shear and maximum principle stress that distributed over large distance was found by using
visible light cure spaced custom tray